单项选择题 A new department is formed and a new section of the building is being built out for them. All 50 new employees will need access to the wireless network. Which of the following should be completed to allow these new employees access to the wireless network?（）

单项选择题 Which of the following is required if ports from VLANs on two separate switches need to broadcastto each other?（）

单项选择题 A link light on a switch is an example of which of the following Ethernet properties?（）